<template>
  <div>
    <h1> {{id? '编辑': '新建'}}文章</h1>
    <el-form label-width='100px' @submit.native.prevent='save'>
      <el-form-item label='所属分类'>
        <el-select v-model="model.categories" multiple>
          <el-option v-for="item in parents" :key='item._id' :label='item.name' :value='item._id'></el-option>
        </el-select>
      </el-form-item>
      <el-form-item label='标题'>
        <el-input v-model="model.title"></el-input>
      </el-form-item>
      <el-form-item label='内容'>
        <vue-editor v-model="model.body" useCustomImageHandler @image-added="handleImageAdded"></vue-editor>
      </el-form-item>
      <el-form-item>
        <!-- native-type: 表示其原生类型是submit -->
        <el-button type='primary' native-type='submit'>保存</el-button>
      </el-form-item>
    </el-form>
  </div>
</template>
<script>
import { VueEditor } from "vue2-editor";
export default {
  props: {
    id: {},
  },
  components: {
    VueEditor,
  },
  data() {
    return {
      model: {},
      // 存放父级分类
      parents: [],
    };
  },
  methods: {
    async save() {
      let res;
      if (this.id) {
        // id存在则证明此时是编辑保存操作 => 更新数据
        res = await this.$http.put(`rest/articles/${this.id}`, this.model);
      } else {
        // 否则是新建保存操作 => 新增
        res = await this.$http.post("rest/articles", this.model);
      }
      if (res.data) {
        this.$message({
          type: "success",
          message: "保存成功",
        });
        this.$router.push("/articles/list");
      }
    },
    // 根据id查询分类信息
    async fetchById() {
      const res = await this.$http.get(`rest/articles/${this.id}`);
      this.model = res.data;
    },
    // 查询所有父级分类
    async fetchParents() {
      const res = await this.$http.get("rest/categories");
      this.parents = res.data;
    },
    async handleImageAdded(file, Editor, cursorLocation, resetUploader) {
      var formData = new FormData();
      formData.append("file", file);
      const res = await this.$http.post('uploads', formData)
      Editor.insertEmbed(cursorLocation, "image", res.data.url);
      resetUploader();
    },
  },
  created() {
    if (this.id) {
      this.fetchById();
    }
    this.fetchParents();
  },
};
</script>